Julius berbecker



(No Model.)

H J. BBRBECKER.

MANUFAGTURE 0F SCREW KNOBS.

No. 439,830. Patented Nov. 4, 1.890.

Tiffal 2li-:Mmmm n 1 3 MVM/755555 'ms Nunms versus ou'. Novo-umu,msnwumu, u. c.

UNITED STATES JULIUS BERBEOKER,

PATENT OFFICE.

OF NEV YORK, N. Y.

MANUFACTURE OF SCREW-KNOBS.

SPECIFICATION forming part of Letters Patent No. 439,830, dated November4, 1890.

Application mea May 12, 15390.

T0 aZZ whom it may concern..-

Be it known that I, JULIUS BERBECKER, a citizen of the United States,residing at New York, in the county of New York and State of New York,have invented certain new and useful Improvements in the Manufacture ofScrew-Knobs; and I do hereby declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same.

My invention has for its obj ect the production of screw-knobs whichshall be neat and attractive in appearance, capable of unlimitedvariation in design, and which may be produced entirely by press-work,thus wholly avoiding the use of high priced machinery and greatlyreducing the cost of production.

With these ends in viewI have devised the novel screw-knob and method ofmaking the same, of which the following description, in connection withthe accompanying drawings, is a speciication, numbers being used todenote the several parts.

Figurel is a plan View of a disk from which the head is formed; Fig. 2,an elevation of a wood-screw from which the shank is formed; Fig. 3, asection of the head after itis swaged in place upon the screw; Fig. 4, asection of a completed screw-knob; Fig. 5, a section of knob of thisclass, except that a nail is substituted for a screw; and Fig. 6 is anelevation of a screwknob used in connection with an escutcheon-forexample, as in a drawerpull-an ordinary threaded bolt and nut being usedinstead of a wood-screw.

l denotes the blank from which the head is formed, and which is providedwith a recess 2. These blanks are formed complete and the recess formedtherein at a single operation by an ordinary drop-press.

3 denotes an ordinary wood-screw; 4, a nail, the shank of which isroughened under the head, and 5 an ordinary bolt, having a nut 6, eitherof which may be used in `connection with the blank. Instead of castingthe knob upon the screw or bolt, or of casting the knob in a number ofpieces, leaving them loose on the screw, or of forming the knob ofvitreous or other material and attaching it to the screw by plaster orlead, all of which processes of making are in common use, I form serialNo. 351,442. (No moda a solid head upon the screw or bolt, but form thehead entirelyby press-work and secure it in place by press-work.

7 denotes the necks of the knobs, which I form by cutting a rod ofmetal, ordinarilyV brass, into suitable lengths and turning or otherwiseforming them to any desired orna mental shape, drilling them, and thendriving them on over the screw, as clearly shown in Fig. 4.

It will be seen that if the knob is formed from an ordinary wood -screw,as in Figs. 3 and 4, when the head is swaged in place upon the screw themetal of the head is forced into the cut in the head of the screw, whichassists in holding the head in place. When a nail is used, as in Fig. 5,the irregularities and roughness of the head of the nail will accomplishthe same purpose and prevent the head from turning oi under any ordinarystrain that can be applied. The same is true when bolts are used, as theirregularity of the shape of the heads will hold them firmly in placewhen the metal of the blank is pressed about them.

The necks of the knobs cannot get loose, as they are driven firmly toplace, and there is, moreover, no strain upon them in use.

In making the better grades of knobs, and where they are to be used asdrawer-pulls, as in Fig. 6, I give to the heads any desired ornamentalappcaranceas, for instance, a series of rings as indicated in Fig. 4-itbeing of course understood that it is quite easy to form the metal ofthe head in any desired pattern by cutting the pattern in the die.

Having thus described my invention, I claiml. The herein-describedmethod of making screwknobs, the same consisting in forming blanks withrecesses in one side thereof, placing the heads of wood-screws in saidrecesses, swaging the metal of the blanks about the heads of the screwsto form the heads of the knobs', forming the necks to the required shapeby cutting sections from a rod of metal and drilling out said sectionsto form sleeves, and finally dri ving said sleeves over the screws intoplace under the heads of the knobs.

2. As a new manufacture, a screw or nail provided with a knob or headconsisting of two port-ions, one of which is the head proper,

IOO

and which is swaged upon the blunt end of the said screw or nail, andthe other of which is a bored-out metallic sleeve closely fitting theshank of the said screw or nail and driven into position close to thesaid head proper.

3. As a new manufacture, a screw-knob having a shank 3, consisting of anordinary wood-screw, a head swaged over the ordinary screw-head, and anornamental neck consisting of a metallic sleeve 7, closely fitting the1o shank of the said screw and driven into position close to the saidhead.

In testimony whereof I affix my signature in presence of two witnesses.

JULIUS BERBECKER. Witnesses:

A. M. Woos'rER, ARLEY I. MUNsoN.

